> ## Documentation Index > Fetch the complete documentation index at: https://docs.nozle.dev/llms.txt > Use this file to discover all available pages before exploring further. # A feature has been updated > A feature is updated, or one of its privileges is removed. ## OpenAPI ````yaml /nozle-openapi.yaml webhook feature_updated openapi: 3.1.0 info: title: Nozle API description: >- One specification for the Nozle API. Core operations use the default server https://api.nozle.app/core/api/v1. Engine operations name their own server, https://api.nozle.app/engine/api/v1. Both live on the one host https://api.nozle.app. **Legacy key names, removed after January 19, 2027.** Until January 19, 2027 (inclusive), REST responses and webhook payloads carry the old key beside the new one, with the same value, on every object that had it before. `lago_id` is the old name of `nozle_id`. These old names are the new keys with the former prefix: `lago_add_on_id`, `lago_alert_id`, `lago_charge_filter_id`, `lago_charge_id`, `lago_coupon_id`, `lago_credit_note_id`, `lago_customer_id`, `lago_feature_id`, `lago_fee_id`, `lago_fixed_charge_id`, `lago_integration_id`, `lago_invoice_id`, `lago_invoice_ids`, `lago_item_id`, `lago_order_form_id`, `lago_organization_id`, `lago_original_fee_id`, `lago_parent_id`, `lago_payable_id`, `lago_payment_provider_id`, `lago_payment_request_id`, `lago_plan_id`, `lago_pricing_unit_id`, `lago_quote_id`, `lago_quote_version_id`, `lago_subscription_id`, `lago_tax_id`, `lago_true_up_fee_id`, `lago_true_up_parent_fee_id`, `lago_user_id`, `lago_voided_invoice_id`, `lago_wallet_id`, `lago_wallet_transaction_id`. A key gets its old name only on the objects where it was renamed. Old EU tax codes (`lago_eu_`) resolve to `nozle_eu_` in `tax_codes` inputs and in `GET`, `PUT` and `DELETE /taxes/{code}`. CSV exports (invoices, invoice fees, credit notes, credit note items) repeat the id columns at the end under the old names `lago_id`, `customer_lago_id`, `invoice_lago_id`, `fee_lago_id`, `credit_note_lago_id`, `credit_note_item_lago_id` and `credit_note_item_fee_lago_id`. Read the new names before the removal date. version: 1.49.0 license: name: AGPLv3 url: https://github.com/nozle-dev/core/blob/main/LICENSE contact: email: support@nozle.app servers: - url: https://api.nozle.app/core/api/v1 description: Nozle Billing API security: - bearerAuth: [] tags: - name: Activity Logs description: Everything about Activity logs externalDocs: description: Find out more url: https://docs.nozle.dev/api-reference - name: Analytics description: Everything about Analytics - name: API Logs description: Everything about API logs externalDocs: description: Find out more url: https://docs.nozle.dev/api-reference - name: Features description: Everything about Feature collection externalDocs: description: Find out more url: https://docs.nozle.dev/api-reference - name: Entitlements description: Everything about Entitlement collection externalDocs: description: Find out more url: https://docs.nozle.dev/api-reference - name: Billing Entities description: Everything about Billing Entities externalDocs: description: Find out more url: https://docs.nozle.dev/api-reference - name: Customers description: Everything about Customer collection externalDocs: description: Find out more url: https://docs.nozle.dev/api-reference - name: Plans description: Everything about Plan collection externalDocs: description: Find out more url: https://docs.nozle.dev/api-reference - name: Subscriptions description: Everything about Subscription collection externalDocs: description: Find out more url: https://docs.nozle.dev/api-reference - name: Events description: Everything about Event collection externalDocs: description: Find out more url: https://docs.nozle.dev/api-reference - name: Cost Events description: Detailed internal cost usage linked to Feature Events or customers - name: Shared Costs description: Preview and finalize allocated period costs - name: Cost Intelligence description: Ledger-backed cost analytics and profitability inputs - name: Cost Intelligence Operations description: >- Operator replay tools for recoverable cost-processing failures. These routes accept only Nozle's internal service token; organization secret and publishable keys get `403`. - name: Organizations description: Everything about Organization collection externalDocs: description: Find out more url: https://docs.nozle.dev/api-reference - name: Taxes description: Everything about Tax collection externalDocs: description: Find out more url: https://docs.nozle.dev/api-reference - name: Coupons description: Everything about Coupon collection externalDocs: description: Find out more url: https://docs.nozle.dev/api-reference - name: Add-ons description: Everything about Add-on collection externalDocs: description: Find out more url: https://docs.nozle.dev/api-reference - name: Fees description: Everything about Fees externalDocs: description: Find out more url: https://docs.nozle.dev/api-reference - name: Invoices description: Everything about Invoice collection externalDocs: description: Find out more url: https://docs.nozle.dev/api-reference - name: Wallets description: Everything about Wallet collection externalDocs: description: Find out more url: https://docs.nozle.dev/api-reference - name: Credit Notes description: Everything about Credit notes collection externalDocs: description: Find out more url: https://docs.nozle.dev/api-reference - name: Webhooks description: Everything about Webhooks externalDocs: description: Find out more url: https://docs.nozle.dev/api-reference - name: Webhook Endpoints description: Everything about Webhook Endpoints externalDocs: description: Find out more url: https://docs.nozle.dev/api-reference - name: Payment Receipts description: Everything about Payment receipts externalDocs: description: Find out more url: https://docs.nozle.dev/api-reference - name: Payment Requests description: Everything about PaymentRequests externalDocs: description: Find out more url: https://docs.nozle.dev/api-reference - name: Payments description: Everything about Payments externalDocs: description: Find out more url: https://docs.nozle.dev/api-reference - name: Payment Methods description: Everything about Payment Methods externalDocs: description: Find out more url: https://docs.nozle.dev/api-reference - name: Billing Imports description: Billing Imports operations - name: Billing Status description: Billing Status operations - name: Checkout description: Checkout operations - name: Cost Models description: Cost Models operations - name: Credit Imports description: Credit Imports operations - name: Credits description: Credits operations - name: Entities description: Entities operations - name: Entity Subscriptions description: Entity Subscriptions operations - name: Health description: Health operations - name: LLM Proxy description: LLM Proxy operations - name: Margin description: Margin operations - name: Subscription Changes description: Subscription Changes operations - name: Usage description: Usage operations externalDocs: description: Nozle Github url: https://github.com/nozle-dev paths: {} components: securitySchemes: bearerAuth: type: http scheme: bearer ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.